<div class="login_wrapper" id="loginDiv">
  <div class="animate form login_form">
    <section class="login_content">
      <form action="javascript:void(0)">
        <h1>ZJZ</h1>
        <div>
          <input v-model="user.userName" type="text" class="form-control" placeholder="Username" required="" />
        </div>
        <div>
          <input v-model="user.password" type="password" class="form-control" placeholder="Password" required="" />
        </div>
        <div>
          <input class="form-control input-val" type="text" v-model="inputNum" placeholder="请输入验证码（不区分大小写）"
            style="float: left; width: 65%; margin-bottom: 0px" />
          <canvas id="canvas" @click="draw()" width="100" height="36"></canvas>
        </div>
        <div>
          <a @click="login()" class="btn btn-default submit" href="javascript:void(0)">Log in</a>
          <a class="reset_pass" href="#">Lost your password?</a>
        </div>


        <div class="clearfix"></div>

        <div class="separator">
          <p class="change_link">New to site?
            <a href="/register" class="to_register"> Create Account </a>
          </p>

          <div class="clearfix"></div>
          <br />

          <div class="pull-right">
            Copyright © 2022 JiangHu. All rights reserved. 蜀ICP备 2021031966号-1
          </div>
        </div>
      </form>
    </section>
  </div>
</div>

<script>
  new Vue({
    el: "#loginDiv",
    data: {
      user: {
        userName: "",
        password: "",
      },
      inputNum: "",
      showNum: [],

    },
    methods: {
      login: function () {
        if (this.user.userName == "" ||
          this.user.password == "") {
          layer.msg("请输入用户名和密码", { icon: 0 });
          return;
        }
        if (this.inputNum == "") {
          layer.msg("请输入验证码", { icon: 0 });
          return;
        }else if(this.inputNum != this.showNum.join("")){
          layer.msg("验证码错误", { icon: 0 });
          return;
        }
        var self = this;
        $.ajax({
          url: "/api/login",
          type: "post",
          contentType: "application/json",
          data: JSON.stringify(self.user),
          success: function (result) {
            if (result.status == 200) {
              location.href = "/test/thymeleafTest";
            } else {
              layer.msg(result.message, { icon: 0 });
            }
          }
        })
      },
      draw: function () {
        var canvas_width = $("#canvas").width();
        var canvas_height = $("#canvas").height();
        var canvas = document.getElementById("canvas"); //获取到canvas的对象
        var context = canvas.getContext("2d"); //获取到canvas画图的环境
        canvas.width = canvas_width;
        canvas.height = canvas_height;
        var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
        var aCode = sCode.split(",");
        var aLength = aCode.length; //获取到数组的长度

        for (var i = 0; i <= 3; i++) {
          var j = Math.floor(Math.random() * aLength); //获取到随机的索引值
          var deg = (Math.random() * 30 * Math.PI) / 180; //产生0~30之间的随机弧度
          var txt = aCode[j]; //得到随机的一个内容
          this.showNum[i] = txt.toLowerCase();
          var x = 10 + i * 20; //文字在canvas上的x坐标
          var y = 20 + Math.random() * 8; //文字在canvas上的y坐标
          context.font = "bold 23px 微软雅黑";

          context.translate(x, y);
          context.rotate(deg);

          context.fillStyle = this.randomColor();
          context.fillText(txt, 0, 0);

          context.rotate(-deg);
          context.translate(-x, -y);
        }
        for (var i = 0; i <= 5; i++) {
          //验证码上显示线条
          context.strokeStyle = this.randomColor();
          context.beginPath();
          context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
          context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
          context.stroke();
        }
        for (var i = 0; i <= 30; i++) {
          //验证码上显示小点
          context.strokeStyle = this.randomColor();
          context.beginPath();
          var x = Math.random() * canvas_width;
          var y = Math.random() * canvas_height;
          context.moveTo(x, y);
          context.lineTo(x + 1, y + 1);
          context.stroke();
        }
      },
      randomColor: function () {
        var r = Math.floor(Math.random() * 256);
        var g = Math.floor(Math.random() * 256);
        var b = Math.floor(Math.random() * 256);
        return "rgb(" + r + "," + g + "," + b + ")";
      },
    },
    mounted(){
        this.draw();
      },

  })
</script>